General Department of the Chinese People's Liberation Army (中国人民解放军总参谋部)
On the left a Mao quotation: "The principle of protecting yourself to defeat the enemy is in accordance with all military principles."
The slogan on the right of the Quotation: "In case of a surprise attack."
Nr. 18 of the set 'Posters showing measures against atomic, chemical and bacterial warfare' (1971).